Fig. 13

Important hydrocarbon wells in Switzerland (reproduced from Kündig et al., 1997). The wells Chavornay-1 and -2 were drilled 1912, Tuggen 1925–1928, Servion 1938–1939, Cuarny 1936–1940, Altishofen 1952–1953, Chapelle 1958, Küsnacht 1960, Savigny 1960, Courtion 1960, Risoux 1960–1961, Sorrens 1961, Kreuzlingen-1 1962, Essertines 1963, Pfaffnau-1 1963, Lindau 1964, Pfaffnau-Süd 1964, Berlingen-1 1964, Boswil 1965, Hünenberg-1 1965, Pfaffnau-Süd-2 1965, Pfaffnau-Süd-4 1965, Pfaffnau-Süd-5 1966, Linden 1973, Tschugg 1976, Romanens 1977, Ruppoldsried 1977, Treycovagnes 1978, Entlebuch 1980, Eclépens 1981, Fendringen 1982, Herdern 1982, Hermrigen 1982, Chessel-1001 1987, Thun 1989 (Lahusen & Wyss, 1995). The point symbols, labelled in German, mean, from top to bottom: 1. dry well, 2. gas indication, 3. gas in significant quantities, 4. gas occurrence, 5. oil indication, 6. oil in significant quantities, 7. oil occurrences at the surface, 8. gas occurrence at the surface